package com.limou.config;

import com.limou.filter.JwtAuthenticationTokenFilter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.security.web.access.AccessDeniedHandler;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter;

    @Autowired
    AuthenticationEntryPoint authenticationEntryPoint;
    @Autowired
    AccessDeniedHandler accessDeniedHandler;

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            // 关闭csrf
            .csrf().disable()
            // 不通过Session获取SecurityContext
            .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
            .and()
            .authorizeRequests()
            // 对于登录接口 允许匿名访问
            .antMatchers("/login").anonymous()
            .antMatchers("/logout").authenticated()
            // .antMatchers("/link/getAllLink").authenticated() // 获取友链需认证后访问
            .antMatchers("/comment").authenticated() // 发送评论需认证后访问
            .antMatchers("/user/userInfo").authenticated() // 个人信息接口必须登录后才能访问
// 除上面外的所有请求全部不需要认证即可访问
            // 除上面外的所有请求全部不需要认证即可访问
            .anyRequest().permitAll();

        //配置异常处理器
        http.exceptionHandling()
                .authenticationEntryPoint(authenticationEntryPoint)
                .accessDeniedHandler(accessDeniedHandler);
        // 关闭默认的注销功能
        http.logout().disable();
        // 把jwtAuthenticationTokenFilter添加到SpringSecurity的过滤器链中
        http.addFilterBefore(jwtAuthenticationTokenFilter,
                UsernamePasswordAuthenticationFilter.class);
        // 允许跨域
        http.cors();
    }

    /**
     * 注入authenticationManager到容器中
     * @return
     * @throws Exception
     */
    @Override
    @Bean
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    /**
     * 密码加密
     * @return
     */
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

}